Improvement in padlocks



UNITED STATns JAMES H. MCWILLIAMS, OF NEW YORK, N. Y.

IMPROVEMENT IN PADLOCKS.

To all whom fit may concern: A

Be it known that I, J .urns H. MCWILLIAMS, of the city and State of New York, have invented and made a new and useful Improvement in Padlocks, and I do hereby declare the following' to "bela full, clear, and exact description ofthe said invention, reference being had to the annexed drawing, in Which- Figure 1 is a vertical section of the lock-case and tumblers. Fig. 2 is a side view of the key, and Fig. 3 is a section at the line .r

Padlocks have before been made with circular tumble-rs, notched at their edges, and acted upon by a key inserted from the bottoni of the lock up through the tuinblers, and the edges ofthe tuniblers hold the staple-formed shackle by means of notches, into which the tuniblers enter. Padlocks of this character are known in the trade as the Scandinavian or jail-locks.' In the locks of this construction there is a plate at the lower end of the case, that is put in place after the tuinblers and disks have been inserted, and the said plate is retained in place by the edges ofthe case being tiugned over or riveted. rlhe ends of the shackle rest upon the inner surface of this plate, and the lock is thereby rendered insecure and liable to get out of o rder, because any foreign substance falling into either of the holes into which the shackle is inserted will prevent the shackle passing down into its place, and the plate can be driven off by blows upon the upper part ofthe shackle; besides this, in cases Where the lock is exposed to rain, the Water is apt to run down the shackle into the lock.

My invention is made With a view to remedy ing all these defects; and consists in a shackle formed with shoulders around or upon the shackle above the straight portions that enter the lock, so that the shackle cannot be driven into the lock, neither can water run down the shackle into the lock, as heretofore, and the ends of the shackle not touching the plate will not be arrested by any dirt or slight obstruction that may fall into the lock. The lock-case uv is made with holes for the parallel portions b b of the shackle to pass into, and also with a central cavity for the tuinblers c c, disks al d, and spring c, as heretofore usual. The plate j' is fastened in by the edges of the case a being turned over. The upper part of the shackle is formed with the shouldersz' i, that take against the upper end ofthe case a, for the purposes aforesaid. In cases Where the shackle has been provided with a pin or projection to limit the distance the shackle passes into the lock the same is liable to be bent, broken, or filed off', and it does not act to keep water out ofthe lock.

I claim as my inventionrlhe staple-ibrmed shackle b made with shoulders i to take the upper part of the case c and forni a stop to determine the position of the notches in the shackle relatively to the circular tumblers c, and to prevent the ends of the shackle -being driven against the bottom plate j', as set TnT OFFICE. 

